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Patented Dec. 6, I898.

J. HIGGINBOTTOM.

SEPARATING MACHINE.

(Applicatiop filed Apr. 16, 1896. Eenewed Nov. 15, 1898.)

(No Model.)

6 Sheets-Sheet l.

WILFIEEEES Qm/ m: NORRIS PETERS co.. woruumo, wnuiwsm Patented Dec. 6,I898.

J. HIGGINBOTTOM.

SEPABATING MACHINE.

(Application filed Apr. 16, 1896. Renewed Nov. 15, 1898.)

6 Sheets-Sheet 2.

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Patented Dec. 6, I898.

J. HIGGINBDTTOM.

SEPABATING MACHINE. (Application filed. Apr. 16, 1896. Renewed Nov. 15,1898.)

(No Model.)

6 Sheets-Shaet 3.

m: NORRIS Farms 00., mom-U150; WASHINUTON, u. c.

No. 65,618. Patented Dec. 6, I898.

J. HIGGINBOTTUM. Y

SEPARATING MACHINE.

(Application-filled Apr. 16, 1896. Renewed Nov. 15, 1898.)

(No Model.) 6 Sheets-Sheet 4.

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' No. 615,6!8. Patented Dec. 6. I898.

.1. HIGGIN BOTTOM.

SEPARATING MACHINE.

(Application filed Apr. 16, 1896. Renewed No'v. 15, 1898.)

(No Model.) 6 Sheets-Shut 5.

WIEEEEE 5g 1 l hghjr W 5 I j! I m1. 6|5,6I8. Patented Dec. 6,1898. J.HIGGINBOTTOM. SEPABATING MACHINE.

(Application filed Apr. 16, 1896. Renewed Nov. 15, 1898.) (N0 Model.) 6Sheets-Sheet 6.

Egg 5g I Nirnn STAT-Es PATENT OFFICE.

JAMES HIGGINBOTTOM, OF LIVERPOOL, ENGLAND.

SEPARATING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 615,618, dated December6, 1898. Application filed April 16, 1896. Renewed November 15, 1898.Serial No. 696,519. (No model.)

To all whom it may concern:

Be it known that 1, JAMES HIGGINBOTTOM, milling engineer, a subject ofthe Queen of Great Britain, residing at Liverpool, in the county ofLancaster, England, have invented certain new and useful Improvements inSeparating-Machines, of which the following is a specification.

This invention is applicable to machines having rotary or vibratingsieves in which the currents of dust-laden air are generated; and one ofmy objects is to provide an apparatus which will separate the dust fromthe dustladen air in the machine itself and in a more effective mannerthan hitherto.

The invention is best described by aid of the accompanying drawings, inwhich- Figure 1 is a longitudinal section of a machine. Figs. 2, 3, 4,and 5 are transverse sections on the lines A A, B B, C O, and D D ofFig. 1, respectively. elevation, and Fig. 7 a transverse section, of thenozzles X, enlarged, above the first part of the sieve, hereinaftermentioned. Fig. 8 is an enlarged elevation, and Fig. 9 an enlargedsection, of the group of nozzles N. Fig. 10 is an enlarged elevation,and Fig. 11 an enlarged section, of nozzles N of Fig. 1. Figs. 12 and 13are a vertical section and plan, on an enlarged scale, of cones E. Fig.14 is an enlarged section of nozzles F The machine set forth in thedrawings is designed to separate or purify semolina, middlings, and thelike, and to clearly illustrate the action of the machine I'willdescribe the method I prefer of working the machine when it isseparating or purifying semolina, which will pass through gritsgauze-silk having a mesh of twenty threads per inch and which will notpass through grits gauze-silk having a mesh of twenty-two threads perinch.- The sieve used over the head compartment H of the machine isclothed with grits gauze-silk having a mesh of twenty-four threads perinch, or of such a degree of fineness of silk as would prevent thesemolina from falling through the sieve, and the sieve over the tailcompartment H would be covered with grits gauze-silk having a mesh ofeighteen threads per inch, or of such a degree of coarseness as wouldpermit the semolina to fall through the sieve into the bottom hopper.

Fig. 6 is a longitudinal In the drawings, K is the feed-hopper, and Kfeed-roll feeding the semolina onto the sieve S.

G is a section of the fan, and this section is taken on the bent line LL of Fig. 2 in order to more clearly illustrate the working of theinvention.

X is a tray having a series of long perforations, above which aremounted the longitudinal nozzles and hoods X, set forth in detail inFigs. 6 and 7. The hoods are supported by wire supports, as shown.

M is a channel into which the dust deposited on tray X falls with theshaking of the sieve.

S and S are continuations of the same sieve S.

P and P are partitions separating the space above the sieve, and in thecase of I" below the sieve also, into separate compartments.

X and X are two trays delivering the dust collecting on them intochannels M and M respectively.

F is a second fan with an aperture F from this fan leading to chamber FChamber F has depending therefrom a large series of downward-sloping anddownwardly-flaring cones E, having their small ends projecting into it.These cones are shown on a large scale in Figs. 12 and 13. The sectionalarea of the cones at their large end being very much larger than attheir small end, the current of air passing down through the cones islessened in velocity, and is hence unable any longer to carry dust whichis still in suspension. It therefore deposits the dust on the sides ofthe cone, and as it collects it falls down into the trough to one sideand is collected by the worms E E of Fig. 2. Some of the dust, however,separates in the chamber F and is carried away by the worms E E I preferto make the aggregate area of the small ends of the cones entering thechamber equal to the cross-sectional area of the aperture F. The airleaving the cones passes into chamber F and from there through aperturesF in the top or sides, or in some cases, where the machine is dealingwith heavy grain-seeds or with wheat or semolina and where strong andintense velocities of aircurrents must be used, I arrange to close theair-discharge apertures F in the dust-collecting apparatus, and insteadof allowing the air to be discharged from the machine I placeair-conduits F Fig. 5, to carry the air to a chamber F underneath thesieve of the machine, as shown in Figs. 1 and 5. The air enteringchamber F rises through the sieve S and through the nozzles N on thetray X the sides G and cones E may be constructed of paper, cardboard,or other non conducting material to prevent condensation where thedust-laden air contains vapor.

Reverting now to the front part of the machine, the air ascendingthrough the nozzles. N, already mentioned, enters the chamber G and fromthence to apertures G to the fan G, from whence it is ready to againdescend through the nozzles X and sieve S, thus completing anair-circuit. The valves G and handle G Figs. 1 and 3, are for adjustingthe volume of air passing through this circuit. The action of suchair-circuit upon the semolina being treated is as follows: The dust andsmall particles adhering to the semolinafeed are carried by the downwardair-circuit through the sieve S into the chamber H. The air risingthrough the sieve S and through the moving semolina thereon carries awaythe semolina of a lighter specific gravity up through the nozzles N anddeposits the same on the nozzle-tray X and from thence such semolina isdischarged to the outside of the machine by the channel M The separationmade depends upon the velocity of the aircurrent. The semolina going tothe machine usually contains aportion of the outer branny skin of thewheat. These are much lighter in specific gravity than the lightest ofthe semolina itself. Such pieces of skin are carried by the air-circuitthrough the fan and discharged into the chamber G, where they aredeposited upon the nozzle-trays X and removed from thence to the outsideof the machine by the channel M. The semolina, which has now beenseparated by the air-current, passes to sieve S, where it may besubjected to a second air-current for the purpose of a furtherseparation and purification of the semolina. The semolina, separated andpurified by the sieve S passes to the bottom compartment H and thematerial separated by the air passes to the outside of the machine bythe channel M having been first deposited on the tray of nozzles X FromM it escapes up a discharge-box T. I declare that what I claim isp 1. Ina separating device, the combination of an inclosing casing a fanhavingan exit delivering the air into the closed chamber above thesieve, a sieve of finer mesh than the valuable material to be cleansedand having a shaking device and a nozzle-tray above the sieve incombination with a second sieve receiving the materials from the firstsieve, open below to the current, which is passed through the firstsieve, a dust-collecting tray above this sieve separating the sieve froma closed chamber above, a passage from said closed chamber to the fan,and means for throttling the current of air in some portion of thecircuit, substantially as and for the purposes described.

2. The combination of an inclosing casing a vibrating sieve of finermesh than the diameter of the valuable material to be sifted, acollecting-tray with hoods above the sieve separating the same from aclosed chamber, and a fan for passing into the closed chamber a currentof dusty air from another part of the machine, whereby the majority ofthe dust in the air is collected on the dust-collecting tray beforepassing through the sieve and the current carries off through the sievethe dust and small particles mixed with the valuable material.

3. The combination of an air-current-forming device such as a casing anda fan having a delivery into a closed chamber above a sieve, a sievebelow of smaller mesh than the valuable material to be sifted, formingthe fioor of this chamber and having a shaking device, a closed chamberbelow the sieve, and a second sieve receiving the material from thefirst sieve open below to the current of air that has passed through thefirst sieve, a collecting-tray between this second sieve, and a secondchamber above the sieve delivering into the fan, whereby the dust drivenout of the material to be sifted is deposited in the chamber below andthe current is then used for separating light particles from thematerial, which light particles are deposited on the dust-collectingdevice in the chamber above it and no dusty air is allowed to escapefrom the machine.

4. In a separating-machine, the combination of an inclosing casing asieve having mesh smaller than the material to be sifted, apparatus forshaking the same, means for producing a current downwardly through thefirst portion of the sieve and upward through the middle portion of thesieve in combination with a division separating the space above andbelow the tail portion of the sieve from the middle portion exceptimmediately above the sieve and a'separate device aspirating a currentof air through the tall portion of the sieve in an upward direction andmeans for separating the light particles and dust from this current.

5. In combination with a sieve, a tray of nozzles above the sieve, adust-depositing chamber connected with the space above the tray, aconnection from the dust-depositing chamber to the space below the sieveand a wardly-flaring cones depending from said eascasing and fan forcausing a continuous ciring through which cones the air passesdownculating current through these several parts. wardly.

6. In a separating device, the combination In testimony whereof I havesigned my 5 with the inclosing casing, the sieves and the name to thisspecification in the presence of I 5 means for supplying to the sievesthe matetwo subscribing Witnesses.

rial to be operated upon, of a fan-case and a JAMES HIGGINBOTTOM. fanfor passing air through said sieves, a \Vitnesses: chamber into whichthe air is delivered after G. C. DYMOND,

10 leaving the sieves, and a series of down H. P. SHOOBRIDGE.

